Nervar Star triplized:
Stronglight 28t granny.
Campy Sport (steel) triplized:
That's a 27t granny. I just thought it should be divisible by 3.
Yes there are some cranks that shouldn't be butchered. In my defense, I did this in 1978 when I was 21 years old.
Campy Record "factory" triple, designed for a 36t granny only (no other choice). Jim Merz made 31t rings to fit, so I had to turn my amp up to 11 and make a 30t. It works perfectly, no extra chain noise or rubbing where it's not suppsed to.
Then I thought "huh, why not 29t?"
OK that might be "a bridge too far". It works fine actually but the chain does hit the bolt heads. I didn't dare to counterbore the ring to have the bolt head sit flush, because I'd be removing metal right where the ring is weakest, so these bolt heads to stick out and need a little more frame clearance. FYI the bolts are Ti, just 'cuz. Still adjusting the spacer length in this picture; custom-length light-alloy spacers were made later.
"OK we get it Mark, you like triple cranks. Enough already!"
Well maybe just one more please? Mavic 'Starfish' triplized:
Maybe not the most structurally efficient (i.e. lightest) triple ever, but I like 'em. Mavic had their onw way of triplizing them but I like this way better.
OK enough
Mark B